UMI Performance 73-77 GM A-Body 78-88 G-Body Rear Upper Control Arms Adjustable

If you're looking to firm up the rear suspension on your classic GM A-Body or G-Body, these adjustable upper control arms from UMI Performance are a solid choice. They're designed to replace the stock arms, helping to reduce unwanted movement in the rear end for improved handling and traction, whether you're cruising, hitting the drag strip, or carving corners. This part fits a range of vehicles, including models like the 1973-1988 Buick Regal, 1973-1988 Chevrolet Monte Carlo, and 1973-1988 Pontiac Grand Prix.

What sets these arms apart is UMI's Roto-Joint spherical bearing. This joint significantly cuts down on suspension deflection compared to rubber bushings, giving you a more direct feel and better control. It also makes it easier to adjust your pinion angle, which is crucial for optimizing power delivery and reducing wheel hop, especially when you're launching hard. The arms themselves are well-built, featuring a quarter-inch thick steel construction with CNC laser-cut mounting pads and a mix of TIG and MIG welding for strength. The adjuster itself is made from CrMo steel for added durability and thread strength, and the whole assembly gets a tough powder coat finish.

These are designed as a direct bolt-in replacement, meaning you can adjust them while they're still on the car, simplifying the setup process. Most installations take about an hour or two with basic hand tools.